Serotonin syndrome occurs when your body has too much serotonin, which is a chemical found in your nervous system. Triptans, SSRIs and SNRIs naturally raise serotonin levels. When these medications are taken together, it causes much higher levels of serotonin in your system than you'd experience if you were taking only one of these medications. Fortunately, serotonin syndrome appears to be rare in people who are taking triptans and antidepressant medications.

Signs and symptoms of serotonin syndrome occur within minutes to hours and may include:

Nausea, vomiting and diarrhea

Fever

Increased heart rate (tachycardia)

Changes in blood pressure

Overactive reflexes (hyperreflexia)

Extreme agitation or restlessness

Hallucinations

Loss of coordination

Seizures

Coma

If you experience signs or symptoms of serotonin syndrome, seek immediate medical attention. Left untreated, serotonin syndrome may be fatal.

There may also be a risk of interactions between other antidepressants and migraine medications. Antidepressants known as monoamine oxidase inhibitors (MAOIs) can cause an increase in the level of triptans in your blood and slow the breakdown of serotonin.

If you're taking migraine medications and antidepressants, talk to your doctor, especially if you notice any changes in your health. Don't stop or change the dosages of any of your medications on your own.

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